/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* Copyright (C) 2005 University of Waikato, Hamilton, New Zealand
*/
package weka.filters.supervised.attribute;
import weka.core.Instances;
import weka.filters.AbstractFilterTest;
import weka.filters.Filter;
import junit.framework.Test;
import junit.framework.TestSuite;
/**
* Tests ClassOrder. Run from the command line with: <p/>
* java weka.filters.supervised.attribute.ClassOrderTest
*
* @author FracPete (fracpete at waikato dot ac dot nz)
* @version $Revision: 1.2 $
*/
public class ClassOrderTest
extends AbstractFilterTest {
/** the class index to use for the tests */
protected int m_ClassIndex = 4;
public ClassOrderTest(String name) {
super(name);
}
/** Need to set the class index */
protected void setUp() throws Exception {
super.setUp();
m_Instances.setClassIndex(m_ClassIndex);
}
/** Creates a default ClassOrder */
public Filter getFilter() {
return new ClassOrder();
}
/**
* compares the generated dataset with the original one
*/
protected void performTests(Instances result) {
assertEquals(m_Instances.numAttributes(), result.numAttributes());
assertEquals(m_Instances.numInstances(), result.numInstances());
// None of the attributes should have changed
for (int i = 0; i < result.numAttributes(); i++) {
assertEquals(m_Instances.attribute(i).type(), result.attribute(i).type());
assertEquals(m_Instances.attribute(i).name(), result.attribute(i).name());
}
// did the order change?
boolean orderEqual = true;
for (int i = 0; i < result.numClasses(); i++) {
if (!m_Instances.classAttribute().value(i).equals(
result.classAttribute().value(i))) {
orderEqual = false;
break;
}
}
if (orderEqual)
fail("Order wasn't changed!");
}
/**
* tests the RANDOM order
*/
public void testRandom() {
m_Filter = getFilter();
((ClassOrder) m_Filter).setClassOrder(ClassOrder.RANDOM);
Instances result = useFilter();
performTests(result);
}
/**
* tests the FREQ_ASCEND order
*/
public void testFreqAscend() {
m_Filter = getFilter();
((ClassOrder) m_Filter).setClassOrder(ClassOrder.FREQ_ASCEND);
Instances result = useFilter();
performTests(result);
}
/**
* tests the FREQ_DESCEND order
*/
public void testFreqDescend() {
m_Filter = getFilter();
((ClassOrder) m_Filter).setClassOrder(ClassOrder.FREQ_DESCEND);
Instances result = useFilter();
performTests(result);
}
public static Test suite() {
return new TestSuite(ClassOrderTest.class);
}
public static void main(String[] args){
junit.textui.TestRunner.run(suite());
}
}